Chemical Engineering - Fluid Mechanics

21.
Viscosity of a liquid decreases __________ with rise in temperature.
exponentially
linearly
logarithmically
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

22.
In case of a pipe of constant cross-sectional area, the maximum fluid velocity obtainable is
the velocity of sound.
dependent on its cross-sectional area.
dependent on fluid viscosity.
dependent on fluid density.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

23.
Discharge in laminar flow through a pipe varies
as the square of the radius.
inversely as the pressure drop.
inversely as the viscosity.
as the square of the diameter.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

24.
The lift of a ballon is
increased, as it rises to a higher altitude.
due to the weight of the atmospheric air, that it displaces.
not dependent on the temperature of the atmosphere.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

25.
In which of the following body shapes, the pressure drag is large compared to the friction drag ?
Stream line body
Two dimensional body
Bluff body
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.